Vol. 12, Issue 7 (2023)

Author(s):
Harshal Anil Patil and Usha Yadav

Abstract:
The experiment was carried out during the Kharif season of 2022 on the research plot of the Department of Agricultural Entomology at Central Research Farm (CRF), Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj. The Experiment was laid in Randomised Block Design (RBD) with eight treatments each replicated thrice evaluated against spotted pod borer i.e., (T1) Beauveria bassiana (2x108 Spores/ml) @ 2.5 ml/lit, (T2) Verticillium lecanii (1x108 Spores/g) @ 5 g/lit, (T3) Metarhizium anisopliae (1x108 Spores/g) @ 5 g/lit, (T4) Karanj oil 2% @ 20 ml/lit, (T5) Neem Oil 10000 ppm @ 10 ml/lit, (T6) Azadirachtin 0.15% @ 5 ml/lit, (T7) NSKE 5% @ 50 ml/l and (T0) Control. At intervals of 15 days, each biopesticide was applied twice. One day before each treatment, three, seven, and fourteen days after each spray were used to observe the spotted pod borer infestation on each plant. The outcomes showed that, in comparison to the control, the pest infestation was greatly decreased by all of the biopesticides evaluated. The maximum percent reduction of larval population was recorded in Beauveria bassiana (2x108 Spores/ml) (38.32), (58.84) followed by Metarhizium anisopliae (1x108 Spores/g) (35.74), (56.53), NSKE 5% (31.21), (52.95), Karanj oil 2% (26.57), (52.16), Neem oil 10000 ppm (21.86), (46.40) and least effective treatment were Azadirachtin 0.15% (19.33), (42.67) and Verticillium lecanii (1x108 Spores/g) (17.50), (38.82). The highest yield and C:B ratio of green gram was recorded in Beauveria bassiana (2x108 Spores/ml) (17.10 q ha^-1), (1:4.48) followed by Metarhizium anisopliae (1x108 Spores/g) (14.81 q ha^-1), (1:3.70) NSKE 5% (13.32 q ha^-1), (1:3.04) and Karanj oil 2% (12.75 q ha^-1), (1:2.81). The lowest yield was recorded from the plots sprayed with Control (6.59 q ha^-1), (1:1.17).